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Akai NXT2766, Service Manual

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Akai NXT2766 Service Manual Download Page 26

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Summary of Contents for NXT2766

Page 1: ...COLOR TELEVISION TS2766 NXT2766 ...

Page 2: ...CONTENTS Safety Precautions Alignment instruction Debugging instruction Block diagram IC Block diagram Wiring diagram Exploded view Part list Schematic diagram 1 2 3 9 10 14 15 17 36 ...

Page 3: ...familiar with the necessary precaution on this receiver The following are the necessary precautions to be observed before servicing this chassis 1 Since the power supply circuit of this receiver is directly connected to the AC power line an isolation transformer should be used during any dynamic service to avoid possible shock hazard 2 Always discharge the picture tube anode to the CRT conductive ...

Page 4: ...use of substitute replacement parts which do not have the same characteristics as specified in the parts list may create shock fire X RAY RADIATION or other hazards 2 Alignment items and procedure The alignment flow chart see below figure 3 TEST EQUIPMENT 3 1 AUDIO VOLTAMETER EEPROM copy B check Field breadth and field line RF AGC adjust Audio check Focus adjust and aging VG2 adjust White balance ...

Page 5: ... and no sync and sound abnormity electrophoresis of it 4 4 White balance and screen grid voltage adjustment After enter P5 of factory menu use remote sensor directly to adjust white balance by pressing the following digital buttons 1 R BIAS 2 G BIAS 3 B BIAS 4 R BIAS 5 G BIAS 6 B BIAS press p p button to select picture mode custom T1 T2 bright soft nature user custom will be display on the screen ...

Page 6: ...ltage and filament voltage check Connect a high voltage meter between anode cap of picture tube and the ground measure the filament voltage using rms voltmeter set the picture mode to standard the high voltage 29KV 1 5KV filament voltage 6 3 0 1Vrms 4 12 x ray protection check Receive local TV signal set the picture mode to standard shorten the circuit and measure the value of TP1 TP2 restart the ...

Page 7: ... linearity scanning and geometric distortion and over scanning coincide with it P3 50 V SIZE 50HZ field amplitude 75 4 10 V SHIFT 50HZ field center 0 4 10 H PHASE 50HZ H center 10 4 10 V LINE 50HZ V line 16 4 10 V SC 50HZ field S correct 20 4 10 P4 EW 50 TITL 50HZ echelon correct 49 DC 50HZ H amplitude 35 AMP 50HZ pincushion correct 41 COR TOP 50HZ Top margin correct 6 COR BOT 50HZ bottom margin c...

Page 8: ...PF TEST Color band filter center frequency 0 fixed P9 OVER MOD SW Selection over modulation function 0 Fixed 0 nothing 1 have OVER MOD LVL Adjustment over modulation working point 0 fixed BLK STR Dark level expand starting control point 2 Fixed 0 40IRE 2 60IRE 3 OFF BLK GAIN Dark level expand gain 2 Fixed 0 MIN 2 MAX Y APF Selection color trap filter 1 0 trap filter 1 direct pass YcbCr Y C PRE ADJ...

Page 9: ...ce TV AV model RY TV Red chromatism DC level 8 4 4 adjustment dark white balance TV AV model BY YUV DVD input Blue chromatism DC level 8 4 4 adjustment dark white balance DVD input RY YUV DVD input Red chromatism DC level 8 4 4 adjustment dark white balance DVD input S TRAP TEST Sound trap filter adjustment 6 fixed LOW BRI Min brightness 28 fixed LOW CONT Min contrast 30 fixed P13 COL KILL Achroma...

Page 10: ...he unit no use VOL OFFSET 0 GAIN 3 PWM LOGIC 0 AVL MODE 2 AVL DET LEVEL 0 AVL SLOPE 0 PWM SET PWM VOL Volume control of PWM set 1 fixed 1 CHIP VOL Volume control of mono 0 fixed VOL 1 1 volume control speciality 20 fixed VOL 25 25 volume control speciality 60 fixed VOL 50 50 volume control speciality 90 fixed VOL 75 75 volume control speciality 100 fixed 72700 ALC ALC 1 fixed 1 ALC ON VOL Baseband...

Page 11: ...LECTION V OUT N301 LA78041 H OUT V302 2SC2539 T301 FBT CRT DRIVE CRT EHV 28V VIDEO REM IF RF SIF CHROMA R G B POWER N501 CQ12656RT AC 120V 110V 110V AUDIO AMP AN7522 14V H VCC N503 5V 1 V SWITCH 4053 V IN TV OUT VIDEO OUT AUDIO OUT V OUT A OUT Y Cr Cb AUDIO IN VIDEO IN S IN Y Cr Cb C P U A SWITCH 4053 MTS ...

Page 12: ...10 MAIN IC LA76930 BLOCK DIAGRAM ...

Page 13: ... Y input 2 50 12 R ouput 2 65 53 Colour APC filter 3 40 13 G ouput 2 65 52 Selection video output and FSC output 2 40 14 B ouput 2 67 51 Cr input 2 50 15 AKB undo 2 31 50 4 43 MHZ crystal 2 73 16 Field sawtooth filter to capacitance 2 16 49 Cb input 2 50 17 Field output 2 34 48 Fast blank out input 0 18 VCO Reference voltage 1 65 47 R input 1 89 19 H BUS VCC 5V 27mA 6 81 46 G input 1 90 20 H APC f...

Page 14: ... high Level availability 0 35 VDD 5 00 31 I2C DATA 5 00 34 x T2 4 50 32 I2C CLOCK 5 00 33 x T1 2 70 AN7522 Pins function pin function pin function 1 power 7 GND input 2 CH1 output 8 CH2 input 3 GND 9 volume 4 CH1 output 10 CH1 output 5 Stand by 11 GND CH2 output 6 CH1 input 12 CH1 output ...

Page 15: ...13 FSCQ1265RT ...

Page 16: ...14 WIRING DIAGRAM ...

Page 17: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 EXPLODED VIEW ...

Page 18: ...23 30001 04 7 BRAIDED PULLING SPRING 838 10401 00 8 CRT FIXED BRACKET 615 10184 00 9 LINE CLASP 742 30032 38 00 10 REAR PANEL 808 1D650 020 11 FRAME 863 6A127U000F 12 LED COLUMN 700 60210 00 13 BUTTON BOARD 667 TS2967 05A 14 CRT CUSHION 868 20175 00 15 FRONT CABINET 611 E66C0J0H4A 16 FRONT NAMEPLATE 808 10783 A1 17 WASHER 868 20217 00 18 SPEAKER 384 40908 B0 19 20 SPEAKER BRACKET 870 30059 00 21 P...

Page 19: ...0 E68CG 020 BACK CABINET MOLD BLACK 808 70239 00 EVA GLUE 150X50X1 838 10401 00 BRAIDED WIARE SPRING 851 24012 11 SCREW SJ2824 ST4X12C D Zn 851 24012 11 SCREW SJ2824 ST4X12C D Zn 851 24014 14 SCREW SJ2824 ST4X14C Y 851 24014 14 SCREW SJ2824 ST4X14C Y 851 24016 14 SCREW SJ2824 ST4X16C Y 851 24016 14 SCREW SJ2824 ST4X16C Y 851 24020 14 SCREW SJ2824 ST4X20C Y 851 24020 14 SCREW SJ2824 ST4X20C Y 851 2...

Page 20: ...68 20123 00 RUBBER WASHER 868 20175 00 SUPPORT CUSHION 868 20696 00 FRAME 压 BLOCK 870 2B793 00 CRT BRACKET 880 10205 906 BACK PLATE NXT2766 NEXXTECH 880 10783 A1 FRONT LOGO NEXXTECH SILVERY GREY 10C 881 60085 BLANK WARNING LABEL 881 60085 BLANK WARNING LABEL 881 64014 00 TRANSPORTATION LABEL NXT2766 NEXXTECH 881 64055 00 WARNING LABEL NXT2066 NEXXTECH 881 64056 00 REMOTE CONTROL UNIT LABEL NXT2766...

Page 21: ...D110 50V 2 2uF M CS16 464 60522 M0 ELECTROLYTIC CAPACITOR CD110 50V 2 2uF M CS18 464 60533 M0 ELECTROLYTIC CAPACITOR CD110 50V 3 3uF M CS03 464 60610 M0 ELECTROLYTIC CAPACITOR CD110 50V 10uF M CS01 464 6D710 M0 ELECTROLYTIC CAPACITOR CD110 16V 100uF M CS19 464 6E547 M0 ELECTROLYTIC CAPACITOR CD110 25V 4 7uF M CS14 467 1C110 H03 CARBON RESISTOR 1 6W 100Ω J RS06 467 1C110 H03 CARBON RESISTOR 1 6W 10...

Page 22: ...DE FR103 VD505 340 00079 00 DIODE FR103 VD507 340 00163 00 DIODE RGP10G VD318 340 00256 00 DIODE BYT56M VD509 340 00297 00 DIODE ERD07 15 VD317 340 80015 00 RECTIFIER RS405G VD501 343 25390 00 TRANSISTOR 2SD2539 V302 343 52480 30 TRANSISTOR 2SC5248E V306 352 04310 00 IC LM431A M N504 352 05740 00 IC uPC574 D N101 352 06210 70U IC TLP621 GB UL O N502 352 12650 90 IC FSCQ1265RT N501 352 24080 50 IC ...

Page 23: ...C350 462 83356 H0 POLYESTER CAPACITOR CBB21 200V 0 056uF J C304 462 83439 H0 POLYESTER CAPACITOR CBB21 200V 0 39uF J C339 462 88272 H0 POLYESTER CAPACITOR CBB81 1600V 7200PF J C310 462 88272 H0 POLYESTER CAPACITOR CBB81 1600V 7200PF J C311 464 04747 M0R ELECTROLYTIC CAPACITOR 200USP470MA35 C507 464 62547 M0 ELECTROLYTIC CAPACITOR CD288 160V 4 7uF M C340 464 62633 M0 ELECTROLYTIC CAPACITOR CD288 16...

Page 24: ...2 477 20005 00 POWER FILTER LF21061 L502 477 20031 00 POWER FILTER LCL 21 L501 477 40031 00 FIXED COIL LG750 L301 477 40031 00 FIXED COIL LG750 L503 477 40111 00 FIXED COIL LH133 L307 569 18101 00U FUSE 51S 5A 125V FU501 590 40707 00 TUNER 115 B 8035AZ TUNER 667 TSX35 01 MAIN PCB ASS Y MANUAL INSERTION 681 40003 00 OK LABEL 706 20173 00 HEAT SINK N201 706 20173 00 HEAT SINK N503 706 20173 00 HEAT ...

Page 25: ...n N503 852 13008 81 SCREW P M3X8 D Zn N505 852 13008 81 SCREW P M3X8 D Zn V306 863 6A127U000F MAIN FRAME HIPS V0 870 20690 U00A FBT BRACKET HIPS V0 881 60074 00 HIGH VOLTAGE WARNING LABEL 893 10300 11 NUT GB6170 86 M3 D Zn N201 893 10300 11 NUT GB6170 86 M3 D Zn N503 893 10300 11 NUT GB6170 86 M3 D Zn N505 893 10300 11 NUT GB6170 86 M3 D Zn V306 894 40030 11 WASHER GB859 87 3 DZn N201 894 40030 11...

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Page 27: ... J511 998 JUMPER WIRE J512 998 JUMPER WIRE J513 998 JUMPER WIRE J514 998 JUMPER WIRE J515 998 JUMPER WIRE J516 998 JUMPER WIRE J517 998 JUMPER WIRE J518 998 JUMPER WIRE J519 998 JUMPER WIRE J521 998 JUMPER WIRE J521 998 JUMPER WIRE J601 998 JUMPER WIRE J602 998 JUMPER WIRE J603 998 JUMPER WIRE J604 998 JUMPER WIRE J605 998 JUMPER WIRE J701 998 JUMPER WIRE J702 998 JUMPER WIRE J703 998 JUMPER WIRE ...

Page 28: ... DIODE HZ6B1 VD202 340 50560 003 ZENER DIODE HZ6B1 VD203 340 50560 003 ZENER DIODE HZ6B1 VD204 340 50560 003 ZENER DIODE HZ6B1 VD511 340 50750 003 ZENER DIODE HZ7C2 VD307 343 10150 104 TRANSISTOR 2SA1015Y Pr2 5 V202 343 10150 104 TRANSISTOR 2SA1015Y Pr2 5 V203 343 10150 104 TRANSISTOR 2SA1015Y Pr2 5 V304 343 10150 104 TRANSISTOR 2SA1015Y Pr2 5 V501 343 18150 104 TRANSISTOR 2SC1815 Y V303 343 18150...

Page 29: ...AMIC CAPACITOR CK45 F1H103ZYR C210 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C215 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C224 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C232 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C237 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C240 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C241 459 2310R 002 CERAMIC CAPACITOR CK45 F1H103ZYR C244 4...

Page 30: ...C602 464 60510 M02 ELECTROLYTIC CAPACITOR CD110 50V 1uF M C701 464 60510 M02 ELECTROLYTIC CAPACITOR CD110 50V 1uF M C718 464 60510 M02 ELECTROLYTIC CAPACITOR CD110 50V 1uF M C719 464 60510 M02 ELECTROLYTIC CAPACITOR CD110 50V 1uF M C722 464 60510 M02 ELECTROLYTIC CAPACITOR CD110 50V 1uF M C723 464 60522 M02 ELECTROLYTIC CAPACITOR CD110 50V 2 2uF M C223 464 60522 M02 ELECTROLYTIC CAPACITOR CD110 50...

Page 31: ...02 ELECTROLYTIC CAPACITOR CD110 16V 470uF M C519 464 6D747 M02 ELECTROLYTIC CAPACITOR CD110 16V 470uF M C521 464 6F710 M02 ELECTROLYTIC CAPACITOR CD110 35V 100uF M C332 467 1C010 H03 CARBON RESISTOR 1 6W 10Ω J R309 467 1C010 H03 CARBON RESISTOR 1 6W 10Ω J R507 467 1C027 H03 CARBON RESISTOR 1 6W 27Ω J R109 467 1C033 H03 CARBON RESISTOR 1 6W 33Ω J R303 467 1C051 H03 CARBON RESISTOR 1 6W 51Ω J R208 4...

Page 32: ... RESISTOR 1 6W 1K J R608 467 1C210 H03 CARBON RESISTOR 1 6W 1K J R710 467 1C210 H03 CARBON RESISTOR 1 6W 1K J R750 467 1C210 H03 CARBON RESISTOR 1 6W 1K J R751 467 1C212 H03 CARBON RESISTOR 1 6W 1 2K J R106 467 1C212 H03 CARBON RESISTOR 1 6W 1 2K J R717 467 1C215 H03 CARBON RESISTOR 1 6W 1 5K J R318 467 1C218 H03 CARBON RESISTOR 1 6W 1 8K J R244 467 1C218 H03 CARBON RESISTOR 1 6W 1 8K J R704 467 1...

Page 33: ...310 H03 CARBON RESISTOR 1 6W 10K J R329 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R329 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R514 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R515 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R521 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R523 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R707 467 1C310 H03 CARBON RESISTOR 1 6W 10K J R713 467 1C310 H03 CARBON RESISTOR 1 6W 10K...

Page 34: ... 1K F R213 467 2D282 G03 METAL RESISTOR 1 4W 8 2K G R311 467 2D368 H03 METAL RESISTOR 1 4W 68K J R513 467 2D418 H03 METAL RESISTOR 1 4W 180K J R512 471 2022K 003 PEAKING COIL SPT0305 220K 5 L201 471 2022K 003 PEAKING COIL SPT0305 220K 5 L202 471 2027K 003 PEAKING COIL SPT0305 270K 5 L203 471 2027K 003 PEAKING COIL SPT0305 270K 5 L204 471 2068K 103 PEAKING COIL LGA0410 68uH K L102 471 2B68K 003 PEA...

Page 35: ... 2X2 5 COPPER M23 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M24 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M25 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M26 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M27 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M28 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M29 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M30 895 6020025 50 RIVET GB876 86 2X2 5 COPPER M31 895 60...

Page 36: ...667 TS32351 05 Stand By KEY BOARD ASS Y ...

Page 37: ...68K TP1 TP1 TP2 TP2 V506 C1815 R524 5K6 R523 10K OFF ON C605 16V 10u C60810u 16V R612 100K R614 15K R613 6K8 R525 220 V505 C1815 R526 5K6 R5165K6 R515 5K6 R243 10K R527 100K C527 10n R528 5K6 S DET S DET KEY KEY S C VIN AV1 AV2 A REM REM 9v DVD DVD R244 1K8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 N601TC4053 TVO R620 75 R245 10K L203 68uH L204 68uH C245 0 1 3 1 2 N504 TL431 R706 10K R707 560K R708 1...

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